Sununu says Ryan backs Romney's plan

8/13/12 9:27 PM EDT

Via CNN, Mitt Romney surrogate John Sununu sought to explain where things stand on Medicare on the GOP ticket:

“The plan that this ticket will be supporting is the Romney plan, and the Romney plan has slight differences with the Ryan plan,” former New Hampshire Gov. John Sununu, a high profile Romney surrogate, told CNN’s “The Situation Room with Wolf Blitzer.”

“Romney’s positions become Ryan’s (positions),” Sununu said...

...“The principle difference is not only does the Romney plan guarantee that anyone 55 and older will not have their Medicare touched, but it provides some options for them, for those under 55 that are slightly different.”

He did not go into what those options would be.

Sununu insisted that Romney and Ryan “don’t disagree” on the Medicare issue.

Asked if that meant Ryan was “abandoning” his own plan, Sununu replied: “He didn’t abandon it — you have a top of the ticket. The top of the ticket is running for president. Presidents make decisions.”

The fact that Romney hasn't said where the differences lie - he wouldn't directly address it at a press conference earlier - underscored that this issue is going to keep coming up.

It also underscores the surprise some Republicans have that, since the campaign says the decision was made on Aug. 1, there isn't a clearer explanation yet.